Thymeleafを使う - samehada3の日記

Thymeleafを使うため最もシンプルな構成で環境を準備する

セットアップ

build.gradle

spring-boot-starter-thymeleaf をdependenciesに追加

plugins {
    id 'org.springframework.boot' version '2.5.0'
    id 'io.spring.dependency-management' version '1.0.11.RELEASE'
    id 'java'
}

group = 'com.example'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '11'

repositories {
    mavenCentral()
}

dependencies {
    compileOnly 'org.projectlombok:lombok'
    implementation 'org.slf4j:slf4j-api'
    implementation 'ch.qos.logback:logback-core'
    implementation 'ch.qos.logback:logback-classic'
    implementation 'com.google.guava:guava:30.1.1-jre'
    implementation 'org.apache.commons:commons-lang3'
    implementation 'commons-beanutils:commons-beanutils:1.9.2'
    implementation 'com.amazonaws:aws-java-sdk-dynamodb:1.12.9'
    implementation 'org.springframework.boot:spring-boot-starter'
    implementation 'org.springframework.boot:spring-boot-starter-web'
    implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
    implementation 'org.springframework.boot:spring-boot-starter-validation'
    implementation 'org.mybatis.spring.boot:mybatis-spring-boot-starter:2.1.4'
    runtimeOnly 'mysql:mysql-connector-java' 
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

test {
    useJUnitPlatform()
}

/src/main/java/com/example/demo/web/controller/GreetingController.java

package com.example.demo.web.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;

// https://tech.chakapoko.com/java/thymeleaf/getting-started-with-thymeleaf.html
// https://www.thymeleaf.org/doc/tutorials/3.0/usingthymeleaf_ja.html#%E7%B9%B0%E3%82%8A%E8%BF%94%E3%81%97%E3%82%B9%E3%83%86%E3%83%BC%E3%82%BF%E3%82%B9%E3%81%AE%E4%BF%9D%E6%8C%81
@Controller
public class GreetingController {

    @GetMapping("/greeting")
    public String geeting(@RequestParam(name = "name", required = false, defaultValue = "World") String name,
            Model model) {
        model.addAttribute("name", name);
        return "greeting";
    }

}

/src/main/resources/templates/greeting.html

<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>Getting Started: Serving Web Content</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
    <p th:text="'Hello, ' + ${name} + '!'" />
</body>
</html>